This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Respiration In Organisms > Class 7 Science Chapter 6 Respiration In Organisms – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 6 Respiration In Organisms Quiz 8 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. ..... is the smallest structural and functional unit of an organism A) Haemoglobin. B) Blood. C) Cell. D) None of the above. Show Answer Correct Answer: C) Cell. 2. The trees in mountain region have ..... shaped leaves. A) Triangle. B) Round. C) Flat. D) Needle. Show Answer Correct Answer: D) Needle. 3. Two examples of substances needed by cells during respiration are ..... A) Carbon dioxide and glucose. B) Oxygen and glucose. C) Urea and amino acids. D) Carbon monoxide and nitrogen. Show Answer Correct Answer: B) Oxygen and glucose. 4. Why is it important for cells to undergo respiration? A) To regulate the cell's temperature. B) To produce energy in the form of ATP for cellular activities. C) To provide structural support for the cell. D) To store genetic information. Show Answer Correct Answer: B) To produce energy in the form of ATP for cellular activities. 5. Earthworms skin is A) Moist and slimy. B) Moist and rough. C) Rough and slippery. D) Rough and slimy. Show Answer Correct Answer: A) Moist and slimy. 6. Carrying out the process of breathing is the function of the ..... system. A) Nervous. B) Digestive. C) Respiratory. D) Circulatory. Show Answer Correct Answer: C) Respiratory. 7. What are the reactants in the equation for cellular respiration? A) Oxygen and lactic acid. B) Carbon dioxide and water. C) Glucose and oxygen. D) Water and glucose. Show Answer Correct Answer: C) Glucose and oxygen. 8. Cellular respiration is carried out in the A) Cells. B) Organs. C) Muscles. D) Tissues. Show Answer Correct Answer: A) Cells. 9. Write the correct sequence of air passage involved in inhalation? A) Larynx$\rightarrow$ Nostrils $\rightarrow$ Pharynx $\rightarrow$ lungs. B) Nostrils$\rightarrow$ Pharynx$\rightarrow$ larynx$\rightarrow$ Trachea $\rightarrow$ alveoli. C) Nasal passage $\rightarrow$ larynx $\rightarrow$ Trachea $\rightarrow$ Pharynx$\rightarrow$ Alveoli. D) None. Show Answer Correct Answer: B) Nostrils$\rightarrow$ Pharynx$\rightarrow$ larynx$\rightarrow$ Trachea $\rightarrow$ alveoli. 10. Match the process with the correct organelle. A) Photosynthesis occurs in the chloroplast; Respiration occurs in the chloroplast. B) Photosynthesis occurs in the chloroplast; Respiration occurs in the mitochondria. C) Photosynthesis occurs in the mitochondria; Respiration occurs in the ribosome. D) Photosynthesis occurs in the ribosome; Respiration occurs in the mitochondria. Show Answer Correct Answer: B) Photosynthesis occurs in the chloroplast; Respiration occurs in the mitochondria. 11. Which organism respirates by diffusion of gases through their moist body surface or skin? A) Tadpole. B) Caterpillar. C) Amoeba. D) Hydra. Show Answer Correct Answer: D) Hydra. 12. Breathing is a ..... process. A) Physical. B) Chemical. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical. 13. Cellular respiration is ..... A) The process by which cells obtain energy from glucose. B) Process by which organisms absorb energy from the sun. C) The process by which cells process carbon dioxide. D) The process by which cells divide. Show Answer Correct Answer: A) The process by which cells obtain energy from glucose. 14. What gas is released as a byproduct of respiration? A) Carbon dioxide. B) Nitrogen. C) Oxygen. D) Hydrogen. Show Answer Correct Answer: A) Carbon dioxide. 15. What will happen when the diaphragm raises upwards? A) We inhale air. B) No change. C) Air is pulled in. D) Air is forced out. Show Answer Correct Answer: D) Air is forced out. 16. Respiration is ..... A) Breaking down food. B) Making noise. C) Inhaling and Exhaling Air. D) Producing energy from glucose. Show Answer Correct Answer: D) Producing energy from glucose. 17. During glycolysis large amounts of usable energy called ..... are produced. A) ATP. B) Oxygen. C) Mitochondria. D) Cellular respiration. E) Cytoplasm. Show Answer Correct Answer: A) ATP. 18. What is fermentation? A) A way to absorb oxygen. B) A type of aerobic respiration. C) A process of anaerobic break down of glucose. D) A method of breathing. Show Answer Correct Answer: C) A process of anaerobic break down of glucose. 19. State True or FalseGills take in oxygen from the water while lungs take in oxygen from the air. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 20. Lungs are present in the chest cavity chest cavity (Fig. 10.4). This cavity is chest cavity surrounded by ..... on the sides A) RIBS. B) HANDS. C) All the above. D) None of the above. Show Answer Correct Answer: A) RIBS. 21. What type of respiration requires oxygen? A) Aerobic. B) Anaerobic. C) All the above. D) None of the above. Show Answer Correct Answer: A) Aerobic. 22. The percentage of oxygen in exhaled air? A) 16.4%. B) 0.04%. C) 21%. D) 4.4%. Show Answer Correct Answer: A) 16.4%. 23. How do fish breathe underwater? A) Fish breathe underwater using gills to extract oxygen from water. B) Fish breathe through their skin to absorb oxygen. C) Fish extract oxygen from the surface of the water. D) Fish use lungs to breathe air like mammals. Show Answer Correct Answer: A) Fish breathe underwater using gills to extract oxygen from water. 24. The balloon like structures present in the lungs are called as A) Blood vessels. B) Alveoli. C) Air bladder. D) None of the above. Show Answer Correct Answer: B) Alveoli. 25. The name of the kingdom that contains unicellular eukaryotes is: A) Protozoa. B) Protista. C) Bacteria. D) Fungi. Show Answer Correct Answer: B) Protista. 26. Which of these is the correct formula for cellular respiration? A) Oxygen + carbon = energy + glucose. B) Glucose + oxygen = carbon dioxide + water + energy. C) Carbon dioxide + water + energy = glucose + oxygen. D) Glucose + carbon dioxide = water + oxygen. Show Answer Correct Answer: B) Glucose + oxygen = carbon dioxide + water + energy. 27. Read the following statements correctly:a) All green plants are angiosperms.b) Angiosperms have seeds enclosed within fruit.Now, choose the correct option from the choices given below: A) Only (a) is correct. B) Only (b) is correct. C) (a) and (b) are correct. D) (a) is correct and (b) is its explanation. Show Answer Correct Answer: B) Only (b) is correct. 28. Diaphragm moves ..... and ..... itself during exhalation A) Down, contracts. B) Right, contracts. C) Left, relaxes. D) Up, relaxes. Show Answer Correct Answer: D) Up, relaxes. 29. Bacteria & fungus are examples of ..... A) Scavengers. B) Autotrophs. C) Decomposersers. D) Omnivores. Show Answer Correct Answer: C) Decomposersers. 30. Which organism among the following respire anaerobically? A) Humans. B) Yeast. C) Animal. D) Plant. Show Answer Correct Answer: B) Yeast. 31. What is the primary purpose of respiration? A) To absorb nutrients from food. B) To regulate body temperature. C) To provide oxygen for energy production and remove carbon dioxide. D) To produce hormones for growth. Show Answer Correct Answer: C) To provide oxygen for energy production and remove carbon dioxide. 32. Diaphragm present in mammals is A) Membrane between external and middle ear. B) Membrane around the brain. C) Partition between the thoracic and abdominal cavities. D) Membrane around lungs. Show Answer Correct Answer: C) Partition between the thoracic and abdominal cavities. 33. Frogs breath through their skins as well as their lungs. A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: B) True. 34. The number of times a person breathes in a minute is breathing rate. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 35. Organisms get energy through A) Food. B) Eating. C) Sleeping. D) None of these. Show Answer Correct Answer: A) Food. 36. The skin of an earthworm is- A) Moist and rough. B) Rough and slimy. C) Moist and slimy. D) Fry and rough. Show Answer Correct Answer: C) Moist and slimy. 37. Which of the following is not respire through skin A) Earth warm. B) Frog. C) Salamander. D) None of these. Show Answer Correct Answer: C) Salamander. 38. Which of the following organisms respire through tracheal system? A) Cockroach. B) Frog. C) Earthworm. D) Fish. Show Answer Correct Answer: A) Cockroach. 39. A large amount of energy is released in anaerobic respiration A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 40. ..... is composed of a fluid A) Water. B) Blood vessel. C) Blood. D) None of the above. Show Answer Correct Answer: C) Blood. 41. Breathing is a process that-i) provides oxygen to the body.ii) breaks down food to release energy.iii) helps the body to get rid of Carbon dioxide.iv) produces water in the body.Which among the given options is true? A) (I) & (II). B) (ii) & (iii). C) (i) & (iii). D) (iiii) & (iv). Show Answer Correct Answer: C) (i) & (iii). 42. Which terms best describe autotrophs? A) Animals; consumers. B) Plants; producers. C) Animals; producers. D) Plants; consumers. Show Answer Correct Answer: B) Plants; producers. 43. Which organelle is responsible for cellular respiration? A) Chloroplast. B) Nucleus. C) Endoplasmic reticulum. D) Mitochondria. Show Answer Correct Answer: D) Mitochondria. 44. Organisms such as yeast that can survive in the absence of air. they are called ..... A) Anaerobic respiration. B) Respiration. C) Aerobic respiration. D) Anaerobes. Show Answer Correct Answer: D) Anaerobes. 45. What is the role of hemoglobin in respiration? A) Hemoglobin is responsible for the production of red blood cells in the bone marrow. B) Hemoglobin regulates blood pH levels by binding to hydrogen ions. C) Hemoglobin absorbs carbon dioxide in the lungs and releases oxygen in the tissues. D) Hemoglobin transports oxygen from the lungs to the body's tissues and carries carbon dioxide back to the lungs. Show Answer Correct Answer: D) Hemoglobin transports oxygen from the lungs to the body's tissues and carries carbon dioxide back to the lungs. 46. In an energy pyramid, which way does energy flow? A) From the top of the pyramid to the bottom. B) From the bottom of the pyramid to the top. C) None of these. D) None of the above. Show Answer Correct Answer: B) From the bottom of the pyramid to the top. 47. During inhalation the diaphragm moves ..... and the ribcage moves ..... A) Up and downwards & inward. B) Down and upward & outward. C) Does not move. D) None. Show Answer Correct Answer: B) Down and upward & outward. 48. One molecule given off by animals during cellular respiration is A) Glucose. B) Oxygen. C) Chlorophyll. D) Carbon dioxide. Show Answer Correct Answer: D) Carbon dioxide. 49. ..... is the outside growth of abnormal cells in the body ..... is an uncontrolled growth of abnormal cells in body A) KanserCancer. B) RiketRicket. C) Skurviscurvy. D) None of the above. Show Answer Correct Answer: A) KanserCancer. 50. Which of the following shows the correct sequence of air passage into the lungs? A) Air sacs $\rightarrow$ larynx $\rightarrow$ trachea $\rightarrow$ bronchi. B) Larynx $\rightarrow$ bronchi $\rightarrow$ trachea $\rightarrow$ air sacs. C) Trachea $\rightarrow$ larynx $\rightarrow$ air sacs $\rightarrow$ bronchi. D) Larynx $\rightarrow$ trachea $\rightarrow$ bronchi $\rightarrow$ air sacs. Show Answer Correct Answer: D) Larynx $\rightarrow$ trachea $\rightarrow$ bronchi $\rightarrow$ air sacs. 51. Which one is written about diaphragm in the below options? A) Don't know the correct answer. B) A large muscular sheet that forms the floor of the chest cavity the muscular sheet is diaphragm. C) That covers the lungs like a protective cage diaphragm. D) None of these. Show Answer Correct Answer: B) A large muscular sheet that forms the floor of the chest cavity the muscular sheet is diaphragm. 52. One set of inhalation and exhalation is called ..... A) Respiration. B) A breath cycle. C) Breathing. D) The breathing rate. Show Answer Correct Answer: B) A breath cycle. 53. The process of producing energy from the food due to its reaction with oxygen is called ..... A) Secretion. B) Breathing. C) Respiration. D) Excretion. Show Answer Correct Answer: C) Respiration. 54. Inhaling & exhaling of air is called as ..... A) Respiration. B) Breathing. C) Expiration. D) Inspiration. Show Answer Correct Answer: B) Breathing. 55. Which part of the plant absorbs oxygen from the soil? A) Leaves. B) Flowers. C) Roots. D) Stems. Show Answer Correct Answer: C) Roots. 56. What is the role of sunlight in photosynthesis? A) Sunlight is responsible for the production of oxygen in photosynthesis. B) Sunlight is used to convert glucose into energy in photosynthesis. C) Sunlight provides the energy for photosynthesis. D) Sunlight is used as a source of carbon dioxide in photosynthesis. Show Answer Correct Answer: C) Sunlight provides the energy for photosynthesis. 57. What is exhalation? A) Exhalation is the act of breathing out. B) Inhalation is the act of breathing in. C) Exhalation refers to the exchange of gases in the bloodstream. D) Exhalation is the process of digesting food. Show Answer Correct Answer: A) Exhalation is the act of breathing out. 58. Name the term which means 'taking in of air rich in oxygen into the body'. A) Breathing. B) Inhalation. C) Respiration. D) Exhalation. Show Answer Correct Answer: B) Inhalation. 59. Which part of Respiratory System carries oxygenated blood from the lungs to the heart? A) Alveoli. B) Pulmonary veins. C) Pulmonary arteries. D) Bronchi. Show Answer Correct Answer: B) Pulmonary veins. 60. The reactants of cellular respiration are A) Water and oxygen. B) Water and carbon dioxide. C) Carbon dioxide and oxygen. D) Sugar and oxygen. Show Answer Correct Answer: D) Sugar and oxygen. ← PreviousNext →Related QuizzesScience QuizzesClass 7 QuizzesClass 7 Science Chapter 6 Respiration In Organisms Quiz 1Class 7 Science Chapter 6 Respiration In Organisms Quiz 2Class 7 Science Chapter 6 Respiration In Organisms Quiz 3Class 7 Science Chapter 6 Respiration In Organisms Quiz 4Class 7 Science Chapter 6 Respiration In Organisms Quiz 5Class 7 Science Chapter 6 Respiration In Organisms Quiz 6Class 7 Science Chapter 6 Respiration In Organisms Quiz 7Class 7 Science Chapter 6 Respiration In Organisms Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books